LBZ: Programming Injector Flow Rate?

[TheBac]

I'd like to revisit this GM document that Henry posted a long time ago:

http://www.duramaxdiesels.com/forum/showthread.php?t=41178&highlight=injector+reprogram

Reason being, a thread came up over at DP concerning an injector replacement on an LBZ and the associated code 0087, and another member referenced "reprogramming the ECM for the new injectors". I thought it was BS, and said so.....then I found Henry's doc.
So I ask:

Is this something that nobody talks about?
Is this something that is just a forgotten step when people are installing aftermarket injectors?
Does it even matter?
Am I wrong and need to apologize to someone?

Can any of you tuners/techs clue me in, because I have NEVER heard of anyone ever having to do this in the 10 years Ive been around Dmaxes.

 

[c20elephant]

Subscribed

 

[Harbin_22]

I put 60% over LBZ injectors in my LMM and didn't program anything and seems fine. I have often wondered about this too

 

[Mikey]

subd

 

[DuramaxPowered]

The only time that I've had to do it was when I put a brand new ECM into a truck.

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[LBZrcks]

The only time that I've had to do it was when I put a brand new ECM into a truck.

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X2, I've had to do it once with an ECM swap GPCM-->ECM do to the truck idling really loud/rattling.

I tried programming the numbers for my LMM injectors in my LBZ with a Tech 2 and got an error code on the tech 2.

 

[TheBac]

So its not something that really has to be done on a "normal" injector swap?

 

[JoshH]

So its not something that really has to be done on a "normal" injector swap?

If you are putting stock Bosch injectors in a truck, they should be programmed if you want the balance rates to be correct, but if you are using modified or non-factory remanned injectors, there is no need to go through the programming. It is only used for calculating the balance rates. If you are using modified injectors that have been balanced, you could probably go in and make the codes all the same, but I doubt it would really make much of a difference.

 

[cat_dr.]

Where are the flow rate numbers located on the injectors?

 

[Porno Joe]

Where are the flow rate numbers located on the injectors?

They aren't on the injectors. You get a sheet or card with the new/rebuilt injector that has a flow number on it

 

[ryan415]

The Bosch remans I put in my truck had the flow rates echted in the side of the injector body. But you will also get the sticker like Joe said.

 

[cat_dr.]

So I won't be able to get with the injectors in the engine? I'm getting p160c code. I swapped ecms a few months back after frying mine and now I'm gettin this code


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[rgullett83]

If all you replaced was your ecm, the flow rates are also stored in the gpcm also. So with a good scan tool you can copy the flow rates from the gpcm to the ecm.

Sent from my GT-I9300

 

[cat_dr.]

That's the problem I have a snap on solis but I messed up and copied them from the ECM to the gpcm and now both are wrong


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[TheBac]

If you are putting stock Bosch injectors in a truck, they should be programmed if you want the balance rates to be correct, but if you are using modified or non-factory remanned injectors, there is no need to go through the programming. It is only used for calculating the balance rates. If you are using modified injectors that have been balanced, you could probably go in and make the codes all the same, but I doubt it would really make much of a difference.

Thanks Josh.

 

[cat_dr.]

Is there anyone I could send my old ECM to and them possibly pull the numbers out of it?


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[THEFERMANATOR]

Is there anyone I could send my old ECM to and them possibly pull the numbers out of it?


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You could put your old ECM back in and copy the flow rates to the GPCM, and then swap back and copy from the GPCM to the other ECM.

 

[cat_dr.]

It's locked up that's why I had to put a new one in. I tried doing that this afternoon and my solis won't connect to it.


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[Swisstyphoon]

It's locked up that's why I had to put a new one in. I tried doing that this afternoon and my solis won't connect to it.


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You should be able to read the codes from the injectors without pulling them.
The numbers are engraved on top of the injector (plastic part).
Just write down all 8 codes and programm them manualy with a tech2.

 

[Hot COCOAL]

So the only reason to program the injectors after a swap is to maintain accurate info for fuel economy and gallons used? Am I understanding that right? I may be swapping out to %60 overs and am wanting to clarify what needs to take place for a smooth swap.